Improvement in extension stove-pipes



R. R. PATTISON] Extension Stove-Pipe.

No. 217,743. Patented July 22,1879.

WITNESSES TTORNEYS.

PETERS, PHOTO-LHNOGRAPNER. WASHINGTON, 0 C.

UNITED STATES PATENT OEEIoE.

ROBERT R. PATTISON, OF TERRE HAUTE, INDIANA.

IMPROVEMENT IN EXTENSION STOVE-PIPES.

Specification forming part of Letters Patent No. 217,743, dated July 22, 1879; application filed April 18, 1879.

To all whom it may concern:

Be it known that l, ROBERT R. PATTISON, of Terre Haute, in the county of Vigo and State of Indiana, have invented a new and Improved Extension Stove-Pipe, of which the following is a specification.

The object of my invention is to obviate the difficulties usually experienced in jointing, setting, and adjusting lengths of stove-pipe. I make use of pipe in lengths, fitted together to move telescopically upon each other, and fitted with a springcatch of peculiar construction, whereby the pipes are held securely in any position to which they are adjusted.

1n the accompanying drawings, Figure 1 is an elevation, showing several lengths of pipe connected together and constructed in accordance with my invention. Fig. 2 is a vertical section on line a: a: of Fig. 1. Fig. 3 is a crosssection on line y y. Fig. 4 is a cross-section on line 2 2, showing the groove in one section of the pipe.

Similar letters of reference indicate corresponding parts.

A B O are lengthsof stove-pipe, attached together and to the elbow D, the lengths B 0 having my invention applied to them, so that by their adjustment the height of elbow D may be regulated as desired.

In long lines of pipes the adjustable joint may be applied at two or more points; but usually one adjustable joint is sufficient.

The length B is adapted for sliding within the length 0, and the outer ends of both B and O are drawn in or formed tapering, so

that they may be fitted to the usual lengths of pipe.

The folded seam of pipe B is formed with,

cross-indentations a, and pipe O is shaped to form a groove, 1), for the folded seam of B, so that these pipes cannot turn upon each other.

Attached to the outside of pipe (J is a flat steel sprin c, the moving end of which is bent of a shape to pass a slot in groove 1) into the indentations a of pipe B, and thereby prevent the pipe C from slipping down upon B.

By this construction the lengths B O can be adjusted to regulate the length of the Whole pipe or the height of the elbow, and when adjusted the spring a retains the parts in position.

To shorten the pipe, the spring 0 will be disconnected by hand, pipe 0 drawn down to the desired point, and the spring-catch then allowed to spring back. I

In lengthening, the pipes will be drawn out and the spring will pass over the indentations.

Having thus described my invention, 1 claim as new and desire to.secure by Letters Patent- The combination of the pipe B, provided with the folded and notched seam a, and the pipe 0, provided with the groove b and the spring 0. substantially as and for the purpose set forth.

ROBERT RICHMOND PATTISON.

Witnesses W. B. MANNING, GEO. SEYFERT, Jr. 

